Along with the latest mobile operating system, Apple has issued OS X Yosemite 10.10.4 software update for Mac users for free. The update can be downloaded and installed through Software Update in the Mac App Store.

The new update improves the stability, compatibility and security for Mac. One of the most notable bug fix in this release is the removal of 'discoveryd' networking process replaced with older mDNSresponder.

Apple had introduced the discoveryd process in Yosemite to replace mDNSresponder but the former created issues such as slow wake from sleep, failures to resolve DNS names, duplicate machine names, Wi-Fi disconnects, excessive CPU usage, battery drain and more.

Apart from the fix, following are the other improvements and changes added in this update.